.380 Auto vs 5.7x28mm
The .380 Auto vs 5.7x28mm comparison shows two different approaches to compact-pistol performance. The 5.7x28mm (40gr JHP at 1800 fps) retains 203 ft-lbs at 50 yards while the .380 Auto (90gr JHP at 1000 fps) drops to 166 ft-lbs. Penetration diverges significantly: the 5.7x28mm reaches 18.0-18.8 inches, exceeding the FBI's 12-18 inch window, while the .380 Auto penetrates only 8.8-9.0 inches. Recoil is nearly identical at 1.65 ft-lbs for the 5.7x28mm and 1.41 ft-lbs for the .380 Auto. The 5.7x28mm offers higher capacity (often 20+ rounds) and flatter trajectory, but ammunition costs more and pistol options remain limited.
Ammunition Parameters
.380 Auto Parameters (Self-Defense Load)
5.7x28mm Parameters (Self-Defense Load)
.380 Auto vs 5.7x28mm Ballistics Chart
Comparing bullet drop at various ranges between .380 Auto and 5.7x28mm.
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.380 Auto vs 5.7x28mm Energy Comparison
Comparing the muzzle energy and energy retention at various distances between .380 Auto and 5.7x28mm.
.380 Auto vs 5.7x28mm Bullet Penetration
Comparison of estimated penetration depth in 10% ballistic gel between .380 Auto and 5.7x28mm at self-defense distances.
Self-Defense Ammunition Penetration
Notes:
- FBI standard for optimal penetration is 12-18 inches in 10% ballistics gel
- Our penetration data is calculated using mathematical models based on sectional density, velocity, and expansion factors. While not actual gel tests, our calculations have been validated against manufacturer test data and provide reliable estimates for comparison purposes.
- Actual results may vary depending on clothing barriers and other factors
.380 Auto vs 5.7x28mm Recoil
Comparing recoil energy and impulse between .380 Auto and 5.7x28mm.
.380 Auto Recoil (Self-Defense Load)
5.7x28mm Recoil (Self-Defense Load)
Notes:
- Recoil calculations based on bullet weight, velocity, powder charge, and firearm weight
- Recoil energy indicates the felt force when firing the weapon
- Recoil impulse represents momentum transfer during firing
- Actual felt recoil can vary based on grip, stance, and firearm design
.380 Auto vs 5.7x28mm Velocity
Velocity decay from muzzle to 50 yards for .380 Auto and 5.7x28mm.
.380 Auto vs 5.7x28mm Average Cost
Comparing cost per round and training affordability between .380 Auto and 5.7x28mm.